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TMPRSS2 is a functional receptor for human coronavirus HKU1
We demonstrate that the transmembrane protease TMPRSS2 is a receptor for coronavirus HKU1; it triggers HKU1-mediated cell–cell fusion and viral entry by binding to both HKU1A and HKU1B spikes.
- Nell Saunders
- , Ignacio Fernandez
- & Olivier Schwartz
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Article
| Open AccessSialoglycan binding triggers spike opening in a human coronavirus
Binding of a sialoglycan-based primary receptor by the spike protein of the common cold human coronavirus HKU1 triggers conformational changes to a state that would allow binding to a second receptor required for cell entry.
- Matti F. Pronker
- , Robert Creutznacher
- & Daniel L. Hurdiss
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Article |
Retrotransposons hijack alt-EJ for DNA replication and eccDNA biogenesis
Retrotransposons hijack the alternative end-joining DNA repair process of the host for a circularization step to synthesize their second-strand DNA.
- Fu Yang
- , Weijia Su
- & ZZ Zhao Zhang
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Article |
BTN3A3 evasion promotes the zoonotic potential of influenza A viruses
A protein that evolved in primates, BTN3A3, is expressed in human airways and shows antiviral activity against avian IAVs but not against human IAVs.
- Rute Maria Pinto
- , Siddharth Bakshi
- & Massimo Palmarini
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Article |
Norovirus MLKL-like protein initiates cell death to induce viral egress
The murine norovirus NTPase NS3 induces mitochondrial disruption, resulting in cell death, which is required for viral egress.
- Guoxun Wang
- , Di Zhang
- & Tiffany A. Reese
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Article
| Open AccessThe structural basis for HIV-1 Vif antagonism of human APOBEC3G
The authors report the cryo-EM structure of human A3G bound to HIV-1 Vif, and the hijacked cellular proteins that promote ubiquitin-mediated proteolysis, suggesting how Vif antagonizes A3G by intercepting it to prevent viral restriction.
- Yen-Li Li
- , Caroline A. Langley
- & John D. Gross
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Article
| Open AccessClose relatives of MERS-CoV in bats use ACE2 as their functional receptors
NeoCoV and its close relative, PDF-2180, can efficiently bind to and use specific bat ACE2 orthologues and, less favourably, human ACE2 as entry receptors through their receptor-binding domains on the spike protein.
- Qing Xiong
- , Lei Cao
- & Huan Yan
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Article |
The γδ IEL effector API5 masks genetic susceptibility to Paneth cell death
Intraepithelial lymphocytes expressing γ and δ T cell receptor subunits protect Paneth cells from cell death caused by viral infection or Crohn's disease.
- Yu Matsuzawa-Ishimoto
- , Xiaomin Yao
- & Ken Cadwell
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Article |
Coronaviruses exploit a host cysteine-aspartic protease for replication
Coronaviruses exploit the host caspase-6 to cleave coronavirus nucleocapsid protein into fragments with interferon-antagonizing activity to facilitate virus replication.
- Hin Chu
- , Yuxin Hou
- & Kwok-Yung Yuen
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Article |
Combination anti-HIV antibodies provide sustained virological suppression
Combination therapy of broadly neutralizing monoclonal antibodies can provide long-term virological suppression in individuals infected with HIV without antiretroviral therapy.
- Michael C. Sneller
- , Jana Blazkova
- & Tae-Wook Chun
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Article |
Climate change increases cross-species viral transmission risk
Changes in climate and land use will lead to species aggregating in new combinations at high elevations, in biodiversity hotspots and in areas of high human population density in Asia and Africa, driving the cross-species transmission of animal-associated viruses.
- Colin J. Carlson
- , Gregory F. Albery
- & Shweta Bansal
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Article |
Bat coronaviruses related to SARS-CoV-2 and infectious for human cells
A study reports the detection and characterization of SARS-CoV-2-like viruses in Laotian cave-dwelling bats that are also demonstrated to infect human cells through the ACE2 pathway.
- Sarah Temmam
- , Khamsing Vongphayloth
- & Marc Eloit
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Article
| Open AccessACE2 binding is an ancestral and evolvable trait of sarbecoviruses
ACE2 binding is an ancestral, widespread trait of sarbecovirus receptor-binding domains, and many single mutations enable binding to different ACE2 receptors.
- Tyler N. Starr
- , Samantha K. Zepeda
- & Jesse D. Bloom
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Article |
SARS-CoV-2 Omicron variant replication in human bronchus and lung ex vivo
Omicron replicates faster than the wild-type, D614G, Alpha, Beta and Delta SARS-CoV-2 variants in the bronchi but less efficiently in the lung parenchyma.
- Kenrie P. Y. Hui
- , John C. W. Ho
- & Michael C. W. Chan
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Article |
VLDLR and ApoER2 are receptors for multiple alphaviruses
Studies using viral coat glycoproteins show that alphaviruses can enter cells via the very low-density lipoprotein receptor (VLDLR) and apolipoprotein E receptor 2 (ApoER2), members of an evolutionarily conserved family of lipoprotein receptors.
- Lars E. Clark
- , Sarah A. Clark
- & Jonathan Abraham
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Article
| Open AccessGenome surveillance by HUSH-mediated silencing of intronless mobile elements
The human silencing hub (HUSH) complex uses introns to distinguish intronless foreign DNA from intron-containing host DNA and modifies chromatin to silence transcription of retrotransposons and retroviruses.
- Marta Seczynska
- , Stuart Bloor
- & Paul J. Lehner
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Article |
Herpesviruses assimilate kinesin to produce motorized viral particles
Herpes simplex virus type I and pseudorabies virus assimilate kinesin from host epithelial cells and repurpose the motor to traffic to the nuclei of neurons in the peripheral nervous system.
- Caitlin E. Pegg
- , Sofia V. Zaichick
- & Gregory A. Smith
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Article |
Virus-induced senescence is a driver and therapeutic target in COVID-19
Virus-induced senescence is a central pathogenic feature in COVID-19, and senolytics, which promote apoptosis of senescent cells, can reduce disease severity in hamsters,mice, as well as humans infected with SARS-CoV-2.
- Soyoung Lee
- , Yong Yu
- & Clemens A. Schmitt
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Article |
Two cGAS-like receptors induce antiviral immunity in Drosophila
Two cGAS-like receptors, cGLR1 and cGLR2, identified in Drosophila melanogaster are shown to induce antiviral immunity in response to RNA or DNA virus infections through the production of 2′3′-cGAMP and 3′2′-cGAMP.
- Andreas Holleufer
- , Kasper Grønbjerg Winther
- & Rune Hartmann
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Article |
SARS-CoV-2 uses a multipronged strategy to impede host protein synthesis
RNA sequencing, ribosome profiling and metabolic labelling of newly synthesized RNA reveal the strategy used by SARS-CoV-2 to shut off cellular protein synthesis in the host and allow the translation of viral transcripts.
- Yaara Finkel
- , Avi Gluck
- & Noam Stern-Ginossar
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Matters Arising |
Beta human papillomaviruses and skin cancer
- Paul F. Lambert
- , Karl Münger
- & Massimo Tommasino
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Article |
Cytoplasmic control of intranuclear polarity by human cytomegalovirus
Human cytomegalovirus rotates the nuclei of infected cells to set up intranuclear polarization and thereby separate viral DNA from inactive histones and associated host DNA.
- Dean J. Procter
- , Colleen Furey
- & Derek Walsh
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Article |
Envelope protein ubiquitination drives entry and pathogenesis of Zika virus
The E3 ubiquitin ligase TRIM7 polyubiquitinates the envelope protein of Zika virus, adding Lys63-linked polyubiquitin chains that interact with the TIM1 receptor of host cells to enhance virus entry and replication.
- Maria I. Giraldo
- , Hongjie Xia
- & Ricardo Rajsbaum
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Article |
Systemic HIV and SIV latency reversal via non-canonical NF-κB signalling in vivo
Activation of the non-canonical NF-κB signalling pathway by AZD5582 results in the induction of HIV and SIV RNA expression in the blood and tissues of antiretroviral-therapy-treated humanized mice and rhesus macaques.
- Christopher C. Nixon
- , Maud Mavigner
- & J. Victor Garcia
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Article
| Open AccessGiant virus diversity and host interactions through global metagenomics
Analysis of metagenomics data revealed that large and giant viruses are globally widely distributed and are associated with most major eukaryotic lineages.
- Frederik Schulz
- , Simon Roux
- & Tanja Woyke
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Letter |
MHC class II proteins mediate cross-species entry of bat influenza viruses
The DR isotype of the human leukocyte antigen of the MHC class II—or its homologues in bats, pigs, mice and chickens—is an essential cell entry determinant for bat influenza A viruses.
- Umut Karakus
- , Thiprampai Thamamongood
- & Silke Stertz
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Letter |
Calicivirus VP2 forms a portal-like assembly following receptor engagement
Cryo-electron microscopy structures of feline calicivirus and its cellular receptor show that twelve copies of the minor capsid protein VP2 form a portal-like assembly arranged about a pore in the capsid shell.
- Michaela J. Conley
- , Marion McElwee
- & David Bhella
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Letter |
Protocadherin-1 is essential for cell entry by New World hantaviruses
New World hantaviruses—which cause a severe human respiratory disease—use surface glycoproteins to bind to the human protocadherin-1 protein and enter endothelial cells in vitro; depleting protocadherin-1 in Syrian golden hamsters largely protects against disease.
- Rohit K. Jangra
- , Andrew S. Herbert
- & Kartik Chandran
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Letter |
An orthogonal proteomic survey uncovers novel Zika virus host factors
Integrative analyses identify host proteins that are modulated by Zika virus at multiple levels and provide a comprehensive framework for the understanding of Zika virus-induced changes to cellular pathways.
- Pietro Scaturro
- , Alexey Stukalov
- & Andreas Pichlmair
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Letter |
PLA2G16 represents a switch between entry and clearance of Picornaviridae
The phospholipase PLA2G16 is required for the entry of picornaviruses, and in its absence, virus infection is prevented by a galectin-8-mediated process.
- Jacqueline Staring
- , Eleonore von Castelmur
- & Thijn R. Brummelkamp
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Letter |
Host genome integration and giant virus-induced reactivation of the virophage mavirus
Endogenous viral elements found in a marine protozoan have a function in defence against infection by giant viruses.
- Matthias G. Fischer
- & Thomas Hackl
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Letter |
Receptor usage dictates HIV-1 restriction by human TRIM5α in dendritic cell subsets
Human TRIM5α restricts HIV-1 infection of Langerhans cells through Langerin-dependent autophagy pathway.
- Carla M. S. Ribeiro
- , Ramin Sarrami-Forooshani
- & Teunis B. H. Geijtenbeek
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Letter |
Designed proteins induce the formation of nanocage-containing extracellular vesicles
Autonomously produced hybrid biological nanomaterials termed ‘enveloped protein nanocages’ incorporate features for membrane binding, self-assembly, and ESCRT recruitment for cellular release.
- Jörg Votteler
- , Cassandra Ogohara
- & Wesley I. Sundquist
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Letter |
Zika virus infection damages the testes in mice
Infection of male mice with Zika virus caused testicular and epididymal damage, reduction in sex hormone levels, destruction of germ and somatic cells in the testis, loss of mature sperm and reduction in fertility.
- Jennifer Govero
- , Prabagaran Esakky
- & Michael S. Diamond
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Letter |
A CRISPR screen defines a signal peptide processing pathway required by flaviviruses
Components of the endoplasmic-reticulum-associated signal peptidase complex is required for infection by numerous flaviviruses, including West Nile, dengue and Zika viruses, but is not required for infection by other types of virus or for host protein synthesis.
- Rong Zhang
- , Jonathan J. Miner
- & Michael S. Diamond
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Letter |
Genetic dissection of Flaviviridae host factors through genome-scale CRISPR screens
A CRISPR screening approach shows that endoplasmic reticulum (ER)-associated protein complexes, including the oligosaccharyltransferase (OST) protein complex, are important for infection by dengue virus and other related mosquito-borne flaviviruses, whereas hepatitis C virus is dependent on distinct entry factors, RNA binding proteins and FAD biosynthesis.
- Caleb D. Marceau
- , Andreas S. Puschnik
- & Jan E. Carette
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Letter |
Species difference in ANP32A underlies influenza A virus polymerase host restriction
The host protein ANP32A is shown here to be a species barrier to the function of avian influenza virus polymerase in mammalian cells; the mutation E627K in viral protein PB2, which allows mammalian ANP32 family proteins to support the avian virus polymerase, is known to be associated with increased virulence of avian viruses in mammals.
- Jason S. Long
- , Efstathios S. Giotis
- & Wendy S. Barclay
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Article |
SERINC3 and SERINC5 restrict HIV-1 infectivity and are counteracted by Nef
The transmembrane proteins SERINC3 and SERINC5 are identified as new restriction factors for HIV-1 replication; this restriction is counteracted by Nef and glycoGag, which prevent SERINC3 and SERINC5 from becoming incorporated into HIV-1 virions and from profoundly blocking HIV-1 infectivity, suggesting a potential new therapeutic strategy for immunodeficiency viruses.
- Yoshiko Usami
- , Yuanfei Wu
- & Heinrich G. Göttlinger
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Article |
HIV-1 Nef promotes infection by excluding SERINC5 from virion incorporation
The transmembrane protein SERINC5 is identified as a potent inhibitor of HIV-1 particle infectivity that is counteracted by Nef; Nef redirects SERINC5 from the plasma membrane to a Rab7-positive endosomal compartment, thus excluding it from HIV-1 particles, emphasizing the potential of SERINC5 as a potent anti-retroviral factor.
- Annachiara Rosa
- , Ajit Chande
- & Massimo Pizzato
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Letter |
An enteric virus can replace the beneficial function of commensal bacteria
Commensal bacteria are known to have an important role in keeping the host healthy, but the role of eukaryotic viruses has been unknown; now, persistent infection in mice with various strains of enteric norovirus is shown to provide similar host protection.
- Elisabeth Kernbauer
- , Yi Ding
- & Ken Cadwell
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Letter |
Structural basis for hijacking CBF-β and CUL5 E3 ligase complex by HIV-1 Vif
This study provides a crystal structure of the Vif–CBF-β–CUL5–ELOB–ELOC complex, which shows that Vif mimics the action of SOCS2 to interact with CUL5 and ELOC.
- Yingying Guo
- , Liyong Dong
- & Zhiwei Huang
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Letter |
RNA viruses can hijack vertebrate microRNAs to suppress innate immunity
Here it is proposed that RNA viruses can adapt to use the antiviral properties of microRNAs to limit viral replication and suppress innate immunity in particular cell types, and this restriction can lead to exacerbation of disease severity.
- Derek W. Trobaugh
- , Christina L. Gardner
- & William B. Klimstra
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Letter |
Human MX2 is an interferon-induced post-entry inhibitor of HIV-1 infection
Here, a protein known as MX2 is shown to be a major effector of interferon-α-mediated resistance to HIV-1 infection: susceptibility of the HIV-1 virus to inhibition by MX2 is dictated by the Capsid region of the viral Gag protein, and inhibition occurs at a late post-entry step of infection.
- Caroline Goujon
- , Olivier Moncorgé
- & Michael H. Malim
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Letter |
Molecular basis of binding between novel human coronavirus MERS-CoV and its receptor CD26
MERS-CoV is a newly emerged coronavirus that is related to SARS-CoV and has proven fatal in half of the people it has infected to date: here the crystal structure of the MERS-CoV receptor binding domain is presented in complex with its receptor on human cells, CD26.
- Guangwen Lu
- , Yawei Hu
- & George F. Gao
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Letter |
A pathogenic picornavirus acquires an envelope by hijacking cellular membranes
Hepatitis A virus particles released from cells can hijack and become wrapped in host-derived membranes by using proteins that facilitate the budding of many enveloped viruses, calling into question the traditional distinction between enveloped and non-enveloped viruses.
- Zongdi Feng
- , Lucinda Hensley
- & Stanley M. Lemon
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News & Views |
Shock and kill
Antiretroviral therapies block HIV replication but they do not eliminate inactive viruses within cells. A clinical trial shows that a drug can revive HIV in patients as a potential first step towards a cure. See Letter p.482
- Steven G. Deeks
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Letter |
IFITM3 restricts the morbidity and mortality associated with influenza
Interferon-inducible transmembrane (IFITM) protein 3 is shown to be an innate defence mechanism against viral infection in vivo; furthermore, a subset of the patients hospitalized during the H1N1 2009 pandemic carried a variant form of the IFITM3 gene.
- Aaron R. Everitt
- , Simon Clare
- & Paul Kellam
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Letter |
Global landscape of HIV–human protein complexes
Affinity tagging, mass spectroscopy and a tailor-made scoring system are used to identify 497 high-confidence interactions between human proteins and human immunodeficiency virus proteins.
- Stefanie Jäger
- , Peter Cimermancic
- & Nevan J. Krogan
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Letter |
Ebola virus entry requires the cholesterol transporter Niemann–Pick C1
- Jan E. Carette
- , Matthijs Raaben
- & Thijn R. Brummelkamp